SfB 2015 Server Security Update – February 2021

I woke to a flurry of news this morning, with updates to the Windows TCP/IP stack, as well as security updates for Lync Server 2013, SfBS 2015 and 2019.

This update for SfBS 2015 is build 6.0.9319.601, up from the previous 6.0.9319.598. It updated only two components on my Standard Edition Front-End.

What’s Fixed?

This security update resolves a denial of service vulnerability in Microsoft Skype for Business Server and Microsoft Lync Server. To learn more about these vulnerabilities, see Microsoft Common Vulnerabilities and Exposures CVE-2021-24099.

What’s New?

Nothing noted. No cmdlets have been added to the SfB module in this update.

What’s Changed?

Nothing noted.



Here’s the “before” view of it going on to my Lab’s Standard Edition Front-End:


The installer didn’t prompt me to reboot, but I always like to give it one for good measure.

Revision History

10th February 2021: This is the initial release.
– G.

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